Smart thinking and Vaccumm Cleaner

Basic Thinking skill.
Data and logic.
Gather enough data and information.
Derive some useful result from it and apply.
Better to have some kind of formula.

Smart thinking and casual knowledge.
The author emphasis on some casual knowledge relating two items.
Sort of Creative thinking 1+1 method.
Or one of those Medici effect.
Or some chemistry mixture potion stuff.

Not into the Bigger pict social things yet.
Still dwelling on the small itchy mini stuff to built up first